Engraving depicting the Italian end of the St Gotthard tunnel (Airolo), showing the compressed air reservoir used for drilling operations and for ventilation.

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Size: 5804px × 3613px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, air, airolo, alps, archival, archive, century, compressed, construction, drilling, engraving, gotthard, historic, historical, history, italian, massif, pass, reservoir, saint-gotthard, st, switzerland, tunnel, ventilation, workmen